PSE’s latest connection register shows hundreds of megawatts of new wind, solar and battery projects seeking access to the transmission network, while the offshore wind pipeline alone amounts to 8.76 GW of preliminary connection capacity.
Poland’s transmission system is facing a rapidly expanding queue of projects seeking access to the national grid, with large-scale battery storage and renewable generation accounting for a substantial share of the pipeline.
The latest data published by transmission system operator Polskie Sieci Elektroenergetyczne (PSE) provides a detailed snapshot of projects at different stages of the connection process, from applications still undergoing verification to projects whose applications have been confirmed as complete and are undergoing technical and economic assessment.
The register, covering data as at 31 July 2026, is published under Poland’s Energy Law and is updated at least monthly. It includes applications for connection, applications under verification, completed applications under technical and economic analysis, connection refusals and projects for which connection conditions have already been issued. (PSE)
For developers and investors, the register offers a useful indication of where demand for transmission capacity is building — and where grid availability could become a constraint on new investment.
Batteries are moving into the transmission queue
Battery storage is already prominent among the largest applications.
ENERGA Storage has submitted an application for a 1 GW BESS project at Choczewo, with 1.2 GW of charging and discharging capacity. The application was still under verification in the latest register. The same company has a further 400 MW BESS project at Olsztyn Mątki, with 480 MW charging and discharging capacity, also under verification.
Other substantial storage applications include:
| Project | Developer | Location | Connection capacity |
|---|---|---|---|
| BESS Choczewo | ENERGA Storage | Choczewo | 1,000 MW |
| MEE Mątki | RSE 11 | Olsztyn Mątki | 400 MW |
| MEE Golasowice | ESVJ-1 | Podborze | 402 MW |
| MEE Rybnik | PGE Inwest 25 | Wielopole | 401 MW |
| BESS Olsztyn Mątki | ENERGA Storage | Olsztyn Mątki | 400 MW |
| MEE Kartoszyno | PGE Inwest 14 | Żarnowiec | 263 MW |
| MEE Mieczysławów | Magazyn EE Mieczysławów | Pątnów | 200 MW |
The distinction between connection capacity and installed storage capacity is important. PSE’s register separately identifies the power introduced to and drawn from the network, as well as battery charging and discharging capacity. The figures therefore should not automatically be interpreted as MWh of storage or as the physical energy capacity of a battery.
Several of the projects are already classified as complete applications undergoing technical and economic analysis, rather than simply being newly submitted proposals. This includes the Rybnik, Golasowice, Mątki and Kartoszyno projects.
Renewable projects continue to compete for grid capacity
Storage is not the only source of pressure.
PSE’s register includes large wind and solar applications alongside hybrid renewable-plus-storage projects.
Among the projects under verification are Niteos Development’s 259 MW Leszno Gronowo wind project, KarSol’s 164.4 MW Benice-Golczewo wind project and RES Project 4’s 251.4 MW Trzcińsko + Gryfino hybrid project.
The register also includes a number of sizeable solar-plus-storage developments. Solar-Ledno’s project near Leśniów, for example, has a requested connection capacity of 500 MW, combining approximately 250 MW of PV with storage.
Another hybrid development, Besiekierz, submitted by Europejska Grupa Energetyczna, has a requested connection capacity of approximately 440 MW, including nearly 400 MW of PV and almost 400 MW of battery charging/discharging capacity.
The pipeline therefore increasingly reflects a power system in which generation and flexibility are being developed together rather than as separate investment categories.
Offshore wind: 8.76 GW seeking a route to shore
The most striking numbers come from offshore wind.
PSE’s register of preliminary connection conditions currently lists nine offshore wind projects with a combined capacity of 8.76 GW.
All nine have preliminary connection conditions associated with connection points at Choczewo/Krzemienica/SBO, highlighting the strategic importance of northern Poland’s transmission infrastructure to the country’s offshore wind programme. (PSE)
The projects are:
| Project | Developer | Preliminary connection capacity |
|---|---|---|
| ORLEN Neptun III | ORLEN Neptun III | 1,200 MW |
| ORLEN Neptun IV | ORLEN Neptun IV | 1,200 MW |
| Baltica-1 | Elektrownia Wiatrowa Baltica-1 | 1,185 MW |
| Baltica-7 | Elektrownia Wiatrowa Baltica-7 | 990 MW |
| ORLEN Neptun VIII | ORLEN Neptun VIII | 960 MW |
| Baltica-9 | Elektrownia Wiatrowa Baltica 9 | 975 MW |
| ENERGA MFW 2 | ENERGA MFW 2 | 885 MW |
| ENERGA MFW 1 | ENERGA MFW 1 | 810 MW |
| Baltica-5 | Elektrownia Wiatrowa Baltica-5 | 555 MW |
| Total | 8,760 MW |
PSE’s designation of these as preliminary connection conditions is significant. The 8.76 GW should not be presented as 8.76 GW of offshore wind capacity already secured for construction. Preliminary connection conditions form part of the regulatory framework for offshore wind development and are distinct from a final connection agreement. (PSE)
Nevertheless, the scale illustrates the transmission challenge facing Poland’s offshore wind ambitions.
The queue is not simply about generation
Another important feature of the PSE register is the growing diversity of electricity projects seeking transmission access.
Alongside renewables and batteries are large electricity consumers, including data centres. The register includes a 500 MW connection application from Central Airport Data Center, while several other data-centre developments have received connection conditions for hundreds of megawatts of demand.
PSE’s data therefore provides a broader picture of the coming transformation of Poland’s electricity system: new generation, storage and large-scale electricity demand are all competing for access to the same transmission infrastructure.
Grid access is becoming an investment issue
For investors and developers, the significance of the PSE register goes beyond the individual projects it identifies.
A project can have land, permits, financing and a viable business case, but without an acceptable connection route it cannot become a functioning power asset.
The register makes visible the different stages of that process. Some projects are still waiting for their applications to be verified. Others have submitted complete applications and are undergoing technical and economic assessment. Others have already received connection conditions or signed connection agreements. PSE also publishes connection refusals. (PSE)
That makes the register an increasingly useful indicator of the real development pipeline, rather than simply a list of projects announced by developers.
It also shows why transmission investment is becoming inseparable from Poland’s renewable-energy build-out.
The country’s next wave of wind, solar and battery investment will require not only more generation capacity, but a transmission network capable of moving electricity from where it is produced to where it is needed.
PSE has also introduced its Electronic Connection Service System (ESOP), through which applications for connection conditions can be submitted from 1 July 2026. (PSE) The monthly PSE register will therefore be worth watching closely.
For Poland’s energy market, the question is increasingly not simply how much renewable and storage capacity can be built. It is how much of it can actually get onto the grid — and when.
